Process of joining sheets of composition roofing.



-R. P. FERRY.

PROCESS OF JOINING SHEETS 0F COMPOSITION ROOFING.

APPLICATION man MAR. 24,1915.

yg p v Patented Sept. 25, 1917.

RAY I. PERRY, OF MONTGLAIR, NEW JERSEY, ASSIGNOR T0 BARRETT MANUFAC- TUBING COMPANY, A CORPORATION OF WEST VIRGINIA.

PROCESS OF JOINING SHEETS OIE COMPOSITION ROOFING.

permanent waterproof joint in an expedi-- tious and economical mannen. Where I employ the term composition roofing in this application I refer particularly to composition roofing made in sheet form by the process described in the co endin ap lication of James 1C, Wood ey, eria 796,143, filed October 20, 1913, and in gen eral to other composition roofin s in sheet,

tile or shingle form, which have ituminous or similar surfacing which becomes sticky or gummy on application of heat or a solvent and is capable of bein treated by the method described herein. uc'h composition roofing is usually made in sheets about thirty-two or thirty-six. inches wide and when laid on the roof the edge of one. sheet is lapped about two or three inches over the next adjoining lower sheet and the two sheets are generally fastened together by nails,

- which at the same time fasten the sheets to the roof which is being covered. In some cases laths or other special devices are used instead of nails. In some cases a gummy. or

sticky cement is applied to the abutting portions of the lapped sheets so as to unite themtogether and to prevent water from work, ing up at the joint. For convenience,- these cements for the laps are usually made in liquid form so that they can be applied without heating and usually they consist of asphaltic. or similar materials liquefied by a solvent which will later evaporate on ex- Specification of Letters Patent.

ner.

Patented Sept. 25, 191?.

Application filed March 24, 1915. Serial No. 16,581.

below. Preferably I use the composition roofing sheets described in the copending application of James C. Woodley, as mentioned above, such sheets containing fifty per cent. or upward of bituminous or other gummy waterproofing material. These roofing sheets when laid on a -roof are usually lapped each over the next lower adjoining sheet in the customary manner and are or may be nailed together in position. In order to unite the edges of two adjoining sheets where one is lappedover the other, instead of applying a separate liquid or other cement, I produce a cement in situ. I do this by applying suflicient heat to the sheet or sheets at the joint so as to soften it or them sufiiciently to bring the bituminous or other Waterproofing material in the sheets into a sticky or gummy condition and I then bring the edges of the sheets together and employ pressure in any desired manner, so as to cause the sheets to unite or to be cemented together. In applying heat to the edges of the sheets I ordinarily use an iron tool, which may be heated in any convenient man- I may use an iron somewhat similar to those employed in the laying of asphalt pavement, or I may use a tool which is heated electrically or by oil flame, or in any other convenient manner.

When applying pressure to the edge of the sheet, which is in a gummy or sticky condition, I preferably apply a so-called wiping pressure to the edge of the upper sheet 7 so as tocause a portion of same to be wiped down and form a gradual joint to the lower sheet.

The sheets of composition roofing as supplied in rolls are usually covered with a superficial layer of soapstone, talc, etc., to

keep them from sticking together. I may brush or wipe off this soapstone or similar material before heating the edges of the sheets, or I may wash or Wipe it off by using a solvent of the hydro-carbon derivative contained in the sheet of roofing. The solvent will also soften somewhat the edges of the sheets and may facilitate the cementing of the adjoining edges together. If I use sufiicient solvent, I may in some cases cement the edges of the sheets treated with the solvent by merely employing sufiicient pressure without heat and my invention covers this method also.

Whether the edges of the sheet be softened and brought to a sticky condition by heat or by the application of a solvent, the material of the sheets themselves is used in making the joint. Consequently the entire covering of the roof is practically converted into a single sheet of uniform composition throughout; as contrasted with a number of plying heat and pressure and Fig. 2 being a section after completion of the oint.

Fig. lshows the two sheets A, B of the fibrous composition above referred to, with the edge of the formeroverlappin the 'lat-" ter and held in place by means 0 nails The parts being applied as in Fig. 1 are then heated and wiped so as to spread the edge I of the upper sheet down upon the] latter or less extent and thebinding material of the two sheets to be merged, all as shown at},

at the same time softening the sheets at the points of contact and causing the fibrous reinforcement to be interlaced to. a greater D, Fig. 2. V v What I claim isouter surfaces of said sheets togetherwhil in a sticky condition and -then ap lyin outer surfaces of said sheets. together whil cementing material.

3. The process of'joining sheets of com position roofing which consists in bringing outer surfaces of said sheets together, converting the composition in said outer surfaces to a sticky condition and then apply-v ing pressure thereto and thus causing said outer surfaces to be united directly to each v other without the "interposition of additional cementing material.

4. The process of joining sheets of com oodley or similar types the fibrous reposition roofing which consists in bringing outer surfaces of said sheets together, heating in situ the contacting portion of at least one of said sheets sufficiently to convert the composition of said outer surfaces to a sticky condition and then applying pressure thereto and thus causing said outer surfaces to be united directl to each other Without the interposition o additional cementing material.

5. Theprocess of unitin adjoininglapped sheets of composition roo ng which consists in converting the material at the edge of the upper sheet of said roofing in situ to a sticky condition and wiping some of said material in such sticky condition into the lower advjoining sheet of-the roofing so as, to unite in converting the material at the edge of the upper sheet of said'roofing in situ to a sticky condition throughout'the thicknessof such sheet and wiping some of said material in such sticky condition onto the lower adjoining sheet of the roofing so as to unite said sheets without, the interposition of additional cementing material.

" -.7. The process of. covering a roof which consists in applying thereon overlapping sheets composed homogeneously throughout I theirthickness of fibrousbituminous compov f i s'ition,. br inging saidcomposition' in the edge 1. The process of joining-sheets 'of;]co m-=- position roofing which consists in bringin ition a stone ofsaid sheets to'a sticky connd then applying pressure to cause said' fsheets .-'to" be: united directly to each the rYW'ithoutthe interposition of additional icontinuous fibrous bituminous c aracter.

v8. The process of covering a roof which consists in applying, thereon overlapping -'sheets composed homogeneously throughout their thickness of. fibrous bituminous composition which is'non-liquefiable by heat, bringing-said com osition-in the edgeio'f at least one of said s eetsfftoa sticky condition and then applying pressure tocause said sheet's'to he -united :directly to each other without the-interposition of additional cementing material and with the fibers of one sheet interlacedv with those of the next so as to produce a roof covering which is of continuous fibrous bituminous character.

In witness whereof, I have hereunto signed my name.

RAY P. PERRY.

cementing material and with the fibers of 

